York YAKN09BZNWEUH1 Installation And Maintenance Manual

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York YAKN09BZNWEUH1 Installation And Maintenance Manual Manual pdf 16 page image

Installation and Maintenance148.2 Connecting Piping between Indoorand Outdoor UnitsBe sure to apply a sealing cap or water-proof tapeto prevent dust or water from getting into the tubesbefore they are used.Be sure to apply refrigerant lubricant to thematching surfaces of the flare and union beforeconnecting them together. This is effective forreducing gas leaks.(Figure 8.4)For proper connection, align the union tube andflare tube straight with each other, then tighten theflare nut lightly to obtain a smooth match. (Figure 8.5)Tighten the set screw with torque wrench to preventleak of refrigerant. Carefully test leak before runningthe appliance.Remove the burrs at the end of the copper tubewith a tube reamer or file. When reaming, hold thetube bend downward and be sure that no copperscraps fall into the tube. This process is importantand should be done carefully to make a goodflare.(Figure 8.1,8.2)Remove the flare nut from the unit and be sure tomount it on the copper tube.Make a flare at the end of copper tube with a flaretool.(Figure 8.3)8.4 Taping the TubesNote: Do not bind the armoring tape too tightly becausethis will decrease the heat insulation effect. Also besure the condensed drain hose splits away from bundleand drips clear of the unit and the piping.The two refrigerant tubes (and electrical wire if localcodes permit) should be taped together with whitearmoring tape. The drain hose may also e includedand taped together as a bundle with the tubing.Wrap the tape from the bottom of the outdoor unitto the top of the piping where it enters the wall. Asyou wrap the piping, overlap half of each previoustape. (See Figure 8.7)Clamp the piping bundle to the wall, using oneclamp approx. every 120 cm.8.5 Finishing the installationAfter completion of wrapping and insulation, seal thehole on the wall with suitable sealagainst wind and rain.To avoid loss of heat and in prevention of theground being wet by condensed water, allrefrigerant tubes must be insulated with suitableinsulating materials whose minimum thickness willbe 6 mm. (See Figure 8.6)8.3 Heat Insulation of the Refrigerant Tube8.1 Flaring with Tube ExpanderNote: A good flare have the following characteristics:Inside surface is glossy and smooth.Edge is smooth.Tapered sides are of uniform length.8.Refrigerant PipingClampInsulated tubesTubeTapered nutsFlarerFig.8.3Apply refrigerant lubricant here and thereUnion Flare nutInsulationTubeReamerFig.8.1Before AfterFig.8.2Fig.8.5Fig.8.4Fig.8.6Fig.8.7

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